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  • 1
    Electronic Resource
    Electronic Resource
    The high temperature transition of polyethylene into a Condis phase, described on the basis of the cluster-entropy hypothesis (CEH) (1986)
    Springer
    Colloid & polymer science 264 (1986), S. 415-422 
    Details
    ISSN: 1435-1536
    Keywords: Condis phase ; high temperature transition of polyethylene ; cluster-entropy hypothesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract On the basis of atomistic calculations a rotator model of the high temperature Condis phase of polyethylene is proposed. Its cooperative statistical treatment (using CEH for the lateral packing of chains) explains the first order transition from the all-trans crystal as well as the transition dataT t ,ΔS t ,ΔV t . We found that the normal melting (i. e. at pressures below the triple point) is also governed by the onset of the Condis phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419545
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Meander model of amorphous polymers (1982)
    Springer
    Colloid & polymer science 260 (1982), S. 378-393 
    Details
    ISSN: 1435-1536
    Keywords: Amorphous polymers ; biopolymers ; fibrils ; meander model ; superstructur
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Assuming bundles (of shortrange ordered macromolecules, folding back and forth statistically), their equilibrium superstructure and diameter are described on the basis of cluster-entropy-hypothesis (CEH). As primary blocks in the bulk polymer and in thin films coupled meander cubes are most probable, which are linked via their cube diagonals serving as axis of statistical rotation and aggregate to coarse grains. Magnetic birefringence, SANS and elctronmicroscopy are used as further methods to determine the cube side length. Applying the same concept to myosin-, collagen-, and elastin-aggregates, these can be interpreted as equilibrium meander fibrils, additionally stabilized by specific interactions and by the length of the molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01448144
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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